Bulk self-diffusion of 44Ti was studied in α-phase single crystals, at temperatures ranging from 776 to 1132K, using ion-beam sputtering. The results, for diffusion perpendicular to the c-axis, could be described by:

D (m2/s) = 1.7 x 10-8 exp[-192.8(kJ/mol)/RT]

C.Herzig, R.Willecke, K.Vieregge: Philosophical Magazine A, 1991, 63[5], 949-58

 

Table 250

Diffusivity of Ti in α-Ti Single Crystals

 

Temperature (K)

D (m2/s)

Orientation*

1133

1.48 x 10-17

1073

2.30 x 10-18

1023

5.10 x 10-19

1023

2.56 x 10-19

||

973

6.98 x 10-20

923

9.43 x 10-21

923

4.58 x 10-21

||

893

2.68 x 10-21

873

1.80 x 10-20

943

1.25 x 10-19

* wrt c-axis